B0440
Bluetooth Module Fault
The infotainment system has detected a fault in the Bluetooth module. Pairing with phones may fail or audio streaming drops out.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Common causes
Ordered by how often each turns out to be the cause.
- Bluetooth module internal faultCommon
- Antenna cable loose or disconnectedPossible
Parts involved
- Bluetooth Module
- Infotainment Module
- Bluetooth Antenna
B0440 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.